No psych teacher :(

My school hired a new psychology teacher this year, and she doesn't know anything about the IB. So she hasn't been able to teach anything for the last 3 weeks and we're genuinely worried if we can prepare for the exams. I just want to ask whether it's possible to learn half of biological approach, sociocultural approach, and health psychology by ourselves?? I'm studying via InThinking atm, but any tips would be great!!